Coffee-making apparatus



April 27, 1954 PAPPAS 2,676,585

COFFEE-MAKING APPARATUS Filed Feb. 4, 1950 3 Sheets-Sheet '1 I inventorhfldrnegs P. PAPPAS COFFEE-MAKING APPARATUS April 27, 1954 3Sheets-Sheet 2" Filed'Ffeb. 4, 1950 1 Inbeintoi P. PAPPASCOFFEE-MAKINGAPPARATUS April 2 7, 1954 3 Sheets-Sheet 3 Filed Feb. 4,1950 1 Snventor n i I Gtlomegs Patented Apr. 27, 1954 UNITED STATE NTOFFICE COFFEE-MAKING APE'ABATUS Peter Pappas, New Haven, Conn.

Application February 4, 1950, Serial No. 142,393

2 Claims. 1

This invention relates to coffee-making apparatus and more particularlyto an apparatus of this character for use in restaurants or other placeswhere large quantities of coffee are to be made. Such apparatus normallyinclude means for heating the water from which the coffee is made, whichis usually termed the boiler, and also means for keeping the preparedcoffee hot after it has been made and before it is served.

The device of the present invention is constructed particularly to beoperated economically with the use of a relatively small quantity offuel. To this end the coffee urns which hold the prepared coffee areplaced adjacent the central portion of the apparatus, as distinguishedfrom prior devices of this kind in which the boiler is usually centrallylocated and the coifee urns placed on each side of the boiler.

In the present construction the boiler is of unique formation as itincludes a horizontal chamber extending substantially the length of theapparatus and vertically-disposed chambers at the ends and the rear sideof the horizontal chamber. These vertical chambers are connected to eachother to form a U-shaped structure in horizontal section and the two endchambers communicate with the rear chamber, and all communicate with thehorizontal chamber so as to form a hollow water jacket having a base andthree upstanding sides, but open at the front and the top.

The coffee urns are also mounted upon a horizontal water chamber whichis disposed within the boiler jacket described above so that the urnsare enclosed upon three sides by the water jacket of the boiler as wellas resting upon it and, thus, absorb heat from the water jacket.

The horizontal water chamber of the boiler is provided with a centralopening which extends therethrough so that the horizontal base of thejacket of the urns is exposed therethrough and when a burner, such as agas burner for example, is placed under this opening, the frame willimpings upon the water jacket of the urn so as to heat the water thereinas well as impinge upon 'ie adjacent portions of the boiler to heat thewater in the latter.

One object of the present invention is to provide a cofiee-makingapparatus of improved construction and which will be efficient inoperation.

A further object of the invention is to provide a cofieenaking apparatusin which the coffee urns will be embraced within a water jacket whichconstitutes the boiler, so as to absorb heat from the latter.

Still another object of the invention is to provide a coffee-makingapparatus consisting of a boiler or Water heater and coffee urns, theboiler being made in the form of a water jacket having a horizontalchamber and upstanding rear and end chambers communicating with thehorizontal chamber, and the urns of which are mounted between the endwalls of this water jacket so as to be surrounded on three sides by thejacket.

A still further object of the invention is to provide an improved meansfor heating the water in the boiler and urns.

To these and other ends the invention consists in the novel features andcombinations of parts to be hereinafter described and claimed.

In the accompanying drawings:

Fig. 1 is a front elevational view of a coffeemaking apparatus embodyingmy invention;

Fig. 2 is a top plan view of the same;

Fig. 3 is a sectional view on line 3--3 of Fig. 2;

Fig. 4 is a sectional View on line 44 of Fig. 3;

Fig. 5 is a perspective exploded view of the boiler and urn structure;

Fig. 6 a partial sectional view of the lower portion of a cofiee-makingapparatus showing a modified form of my invention; and

Fig. '7 is a sectional view on line "l? of Fig. 6.

To illustrate a preferred embodiment of my invention, I have shown inthe drawings an outer casing or frame it designed to be supported from atable or the like by legs ii. Within the frame is secured a boiler orwater heater of novel form, shown more especially in Figs. 3, 4, and 5.This boiler comprises a horizontal chamber l2 having spaced bottom andtop members !3 and it to provide a horizontal water jacket therebetween.Vertically disposed chambers or jackets i5, and H extend upwardly fromthe horizontal water jacket 12 and communicate therewith at their lowerends. The jacket it has inner and outer walls 15a and 51) while thejacket it has inner and outer walls Ida and 51), and the rear jacket llinner and outer walls Ila and l'ib respectively. The jacket I5 isprovided with a front wall I50, the jacket l6 provided with a front wallHi0, and a top wall I10 covers all of these jackets.

As shown in Fig. 5, these upstanding jackets constitute the end and rearwalls of a hollow rectangular frame and each of these members consistsof spaced walls so as to provide a vertical water jacket communicatingwith the horizontal water jacket l2 at its lower end, as shown forexample in Fig. 4. Moreover, as is shown in this figure, the rear jacketI! communicates at its ends with the end jackets I5 and I6 so as to forma U-shaped structure which may be filled with water.

Mounted within the hollow water jacket above described, and between theend members l5 and I6 thereof, is an urn structure shown more especiallyin Figs. 3 and 5. This structure comprises a horizontal chamber or watertable i8 having openings IS in its upper surface in which are placedurns 20 so that the lower ends of the urns communicate with the hollowtable I8, as shown in Fig. 3.

The bottom 22 of the hollow table is seated on the cover M of thehorizontal water chamber l2 of the boiler and the latter is providedwith a central opening or fine 23 which extends through the chamber [2and exposes the bottom 22 of the water table [8 to the flame of theburner 24, so that the flame will impinge upon the bottom of the hollowwater table l8 of the urns and heat the water therein, as well as heatthe water in the chamber [2. It is, of course, understood that the flue23 makes a water tight connection with the bottom and top walls [3 andI4 of the chamher I 2.

Within the urns 2B are seated the coffee pets 25 within which aresupported the usual coffee baskets 26. The top portion 28 of the casingi is provided with openings 29 which are closed by removable covers 30.In each of the verticallydisposed chambers I and I5 is a water pipe 32connected by the valve structure 33 to a supply spout 34 extending overthe adjacent coffee basket 26 so that water may be admitted when desiredfrom the boiler to the coffee pots 25.

A discharge pipe 3-6 extends upwardly from the opening or flue 23 topermit escape of the burnt gases and a relief valve 31 (Figs. 2 and 3)is provided at the upper portion of the rear water jacket I! of theboiler.

Coffee may be drawn from the pots 25 through the faucets 39 (Fig. 4) andsimilarly water may be drawn from the hollow table it which communieateswith the urns 29 from the faucet 4G and may be drawn from the boiler bythe faucet 4 l. Water may be admitted to the boiler through the supplyline 42 controlled by the valve 43. Openings 39 and it are shown (Fig.5) in the water table 8 for passage of the faucets 39 and 6, and anopening Al is provided in the boiler for the faucet 4 I.

Water is admitted to the urns 29 by the pipe 44 connecting one of theurns with the portion E6 of the water jacket, this communication beingcontrolled by the valve 45 and the two urns are in communication witheach other through a pipe 4E which connects them adjacent the upperportion thereof at a point above the normal water level therein. Placingthe air spaces in the upper portions of the urns in communication inthis manner prevents vibration of the device in use due to resurgence ofthe water in the urns.

It will be apparent that with the above construction the urns and thehollow table 18 with which they are in communication rest upon thehorizontal water jacket I2 of the boiler and are surrounded on threesides by the jackets l5, l6 and ll of the boiler, which makes for veryefiicient operation of the device. Placing the urns within a boilerjacket of this shape effects a. compact arrangement of the parts and atthe same time affords a boiler of sufiicient capacity for the two urns.It will be apparent that the arrangement is much more compact than isthe case where each of the urns and the boiler are arranged as separatestacks upon a supporting base.

In Figs. 6 and 7 of the drawing, I have shown a slight modification ofmy invention. In this form of my device the lower horizontal chamber iiof the boiler is provided with a central opening considerably largerthan the opening or flue 23 described in connection with the form of myinvention shown in Figs. 1 to 5. As disclosed in the drawings, thehorizontal chamber of the boiler in Figs. 6 and '7 is divided into twoparts I2 so that the inner walls 50 of these chambers extend to the rearchamber or jacket IT, as shown in Fig. 7. This provides a relativelylarge opening 51 through which the bottom 22 of the water chamber i8 isexposed.

In the opening 5! a hollow heating coil 53 is disposed, this coil beingconnected with the chambers l2 by pipes 54 and connected with thechamber l! by pipes 55. The coil is of generally circular shape and isprovided with inwardly projecting fiat fins 55 to collect the heat fromthe flame issuing from the burner 51 and convey it to the circular coil53 to heat the water therein. As illustrated, the coil is of cast metaland is generally in the form of a hollow annulus with the fins 56projecting radially inward toward the center of the annulus so as to lieover the burner 51. The provision of a coil of this type insures theheating of the water in the boiler as, due to the fact that the urns areembraced by the boiler, the water in the latter requires a relativelysmall amount of heat.

While I have shown and described some preferred embodiments of myinvention, it will be understood that it is not to be limited to all ofthe details shown, but is capable of modification and variation Withinthe spirit of the invention and within the scope of the claims.

What I claim is:

1. In a coffee-making apparatus, a boiler comprising a horizontalchamber and an upstanding water jacket communicating therewith, saidjacket being of substantially U-shaped form in horizontal cross section,a water table resting on said chamber within the U-shaped walls of thewater jacket to be embraced thereby, a coffee urn above said table andembraced by the U-shaped walls of the jacket, the bottom of said urnopening into the water table, said chamber having an openingtherethrough from top to bottom through which the lower surface of thewater table is exposed, and heating means positioned directly below saidopening for heating the water in the boiler and applying heat to the urnthrough said opening.

2. In a coffee-making apparatus, a boiler comprising a horizontalchamber and an upstanding water jacket communicating therewith, saidjacket being of substantially U-shaped form in horizontal cross section,a water table resting on said chamber within the U-shaped walls of thewater jacket to be embraced thereby, a coffee urn above said table andembraced by the U-shaped walls of the jacket, the bottom of said urnopening into the water table, said chamber having an openingtherethrough from top to bottom through which the lower surface of thewater table is exposed, heating means positioned directly below saidopening for heating the water in the boiler and applying heat to the urnthrough said opening, and a hollow heating coil mounted in said opening,said coil being in communication with the interior of the chamber.

References Cited in the file of this patent UNITED STATES PATENTS NumberNumber 6 Name Date Kaplan Aug. 16, 1887 Swaim July 19, 1898 Beach Dec.16, 1902 Carmichael Aug. 22, 1905 Pahl Jan. 12, 1915 Mintz Jan. 4, 1916Cowart Nov. 27, 1917 Lear Oct. 26, 1920 Kennedy June 5, 1923 IvancicJuly 10, 1923 Wertheimer Oct. 23, 1923 Fiore Nov. 5-, 1929 Ershler Oct.27, 1942 Pappas Apr. 20, 1943

